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Analog Devices Inc. LTC3622EDE-23/5#PBF
- Part No.:
- LTC3622EDE-23/5#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC3622EDE-23/5#PBF.pdf
- Description:
- IC REG BUCK 3.3V/5V 1A DL 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:319
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Product details
Overview
LTC3622EDE-23/5#PBF from Analog Devices is a dual-channel, 17V-input, synchronous step-down regulator with fixed 5V and 3.3V outputs, delivering up to 1A per channel. It operates at 2.25MHz, features ultralow 5µA no-load quiescent current (both channels enabled), ±1% output voltage accuracy, and supports phase-shifted operation for reduced input ripple. It is designed for compact, high-efficiency point-of-load regulation in battery-powered handheld scanners and portable instrumentation.
For engineers reviewing the LTC3622EDE-23/5#PBF datasheet, LTC3622EDE-23/5#PBF pinout, LTC3622EDE-23/5#PBF application, or LTC3622EDE-23/5#PBF equivalent, key selection criteria include its fixed dual-output configuration, 2.25MHz switching frequency, DFN-14 (3mm × 4mm) package, Burst Mode® vs pulse-skipping mode trade-offs, and integrated current limit select functionality.
Technical Context
The LTC3622EDE-23/5#PBF implements a constant-frequency, peak-current-mode control architecture with internal compensation and soft-start. Its dual regulators operate independently with separate RUN, PGOOD, and feedback inputs-though FB1/FB2 are internally tied to fixed 5V/3.3V dividers, eliminating external resistors.
It supports external clock synchronization across ±50% of its nominal 2.25MHz frequency and enables programmable phase shift (0° or 180°) via the PHASE pin-or fine-grained edge-aligned phase control using MODE/SYNC clock duty cycle modulation when PHASE = INTVCC. ILIM pin provides three-level current limit configuration per channel.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 17V - supports wide-range industrial and battery-supplied inputs including 12V rails and Li-ion stacks. |
| Output Voltages | Fixed 5.0V ±1% (Ch1) and 3.3V ±1% (Ch2) - eliminates feedback resistor networks and simplifies layout for dual-rail systems. |
| Switching Frequency | 2.25MHz ±10% - enables use of small 2.2µH–4.7µH inductors and low-ESR ceramic capacitors for space-constrained designs. |
| No-Load Quiescent Current | 5µA (both channels active), <4µA (single channel) - extends battery life in always-on portable devices. |
| Peak Output Current | 1A per channel - sufficient for powering microcontrollers, sensors, and interface ICs without external boost stages. |
| Efficiency | Up to 95% at full load - minimizes thermal dissipation in sealed enclosures and reduces heatsinking requirements. |
| Package | 14-pin DFN (3mm × 4mm, 0.75mm height) with exposed thermal pad - provides low θJA (40°C/W) and supports high-density PCB layouts. |
Pinout & Package
Package: 14-lead (3mm × 4mm) plastic DFN with exposed GND pad (Pin 15), rated for –40°C to +125°C operating junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 (Pin 1) | Channel 1 input supply | Accepts 2.7V–17V; powers INTVCC LDO and Channel 1 power stage. |
| PGOOD1 (Pin 2) | Open-drain status indicator | Asserts high after 32 cycles of stable regulation; sinks ≥2mA at 0.4V max for logic-level interfacing. |
| MODE/SYNC (Pin 3) | Mode select & clock sync input | Tied to INTVCC → Burst Mode®; grounded → pulse-skipping; driven by external clock → synchronized operation with ±50% range. |
| PHASE (Pin 4) | Inter-channel phase control | GND → 0° phase shift; INTVCC → 180° shift or edge-aligned variable phase via external clock duty cycle. |
| PGOOD2 (Pin 5) | Channel 2 status output | Independent open-drain flag with identical timing and drive specs as PGOOD1. |
| ILIM (Pin 6) | Current limit configuration | GND → full 1.8A limit; INTVCC → 0.9A limit; ~1V → Ch1 full / Ch2 halved - enables asymmetric load handling. |
| VIN2 (Pin 7) | Channel 2 input supply | Independent 2.7V–17V input; may differ from VIN1 (e.g., separate battery or rail). |
| SW2 (Pin 8) | Channel 2 switch node | Connects to inductor; requires low-inductance routing and local ceramic decoupling to minimize EMI. |
| RUN2 (Pin 9) | Channel 2 enable input | Logic-high (>1.0V) activates regulator; must not float - tie to GND or control MCU GPIO. |
| FB2 (Pin 10) | Fixed 3.3V feedback reference | Internally connected to 3.3V divider - short to VOUT2 for proper regulation; no external resistors needed. |
| INTVCC (Pin 11) | Internal LDO output | 3.6V ±0.15V, 100mA capable; bypass with ≥1µF low-ESR ceramic capacitor to GND for stability. |
| FB1 (Pin 12) | Fixed 5V feedback reference | Internally connected to 5V divider - short to VOUT1; enables single-component dual-output design. |
| RUN1 (Pin 13) | Channel 1 enable input | Independent logic control; allows staggered startup or dynamic channel disable for power sequencing. |
| SW1 (Pin 14) | Channel 1 switch node | High dv/dt node - requires tight loop area with inductor and input/output caps to suppress radiated emissions. |
| GND (Pin 15) | Power and signal ground | Exposed thermal pad - must be soldered to ≥2cm² PCB copper pour for thermal and electrical performance. |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-output configuration | Eliminates four external feedback resistors and associated layout area - reduces BOM count and improves production yield. |
| Burst Mode® operation | Enables 5µA no-load IQ while maintaining regulated 5V/3.3V outputs - critical for multi-week battery runtime in handheld scanners. |
| Programmable inter-channel phase | Reduces RMS input current ripple by up to 30% in 180° anti-phase mode - lowers required input capacitance and EMI filter size. |
| Selectable per-channel current limit | Supports asymmetric loads (e.g., 1A on 5V rail, 500mA on 3.3V rail) without derating or external current-sense components. |
| Integrated soft-start | 500µs monotonic ramp per channel prevents inrush current and output overshoot during power-up or wake-from-sleep events. |
| Robust protection suite | Includes undervoltage lockout (2.5V), overvoltage shutdown (18.5V), thermal shutdown (150°C), and reverse-current blocking. |
Applications
| Handheld Barcode Scanners | Portable Medical Sensors |
|---|---|
Use Scenario: Compact, battery-operated scanner requiring isolated 5V for laser diode driver and 3.3V for CMOS image sensor and BLE radio. IC Role / Device Role / Timing Role: Dual-output DC/DC converter providing tightly regulated, low-noise rails with independent enable control for power sequencing. Use Value: 5µA quiescent current extends AA/AAA battery life to >6 months in standby; 2.25MHz switching avoids audible noise and enables miniaturized magnetics. |
Use Scenario: Wearable ECG patch with ultra-low-power analog front-end and Bluetooth Low Energy MCU needing clean, stable 3.3V and 5V supplies. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering regulated outputs with Burst Mode® for sub-µA sleep current and fast wake-up response. Use Value: Phase-shifted operation reduces input capacitor stress; ±1% output accuracy ensures ADC reference stability and sensor signal integrity. |
| Industrial Handheld Terminals | IoT Edge Node Controllers |
Use Scenario: Ruggedized terminal with LCD display, RFID reader, and cellular modem requiring robust dual-rail power under varying 7–16V battery input. IC Role / Device Role / Timing Role: High-input-voltage dual buck regulator with overvoltage protection (18.5V clamp) and thermal fault management. Use Value: 17V absolute max rating and 18.5V OVLO protect against automotive jump-start transients; DFN package withstands mechanical shock and vibration. |
Use Scenario: Battery-powered environmental monitor deploying LoRaWAN and multiple sensors (temp/humidity/pressure) with strict energy budget. IC Role / Device Role / Timing Role: Efficient dual-rail supply enabling simultaneous sensor activation and wireless transmission without brownout. Use Value: Up to 95% efficiency at 1A load minimizes self-heating in sealed enclosures; ILIM pin allows dynamic current limiting during RF burst transmission. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65270PWP | Adjustable outputs (0.6V–5.5V), 2.2MHz, 2A per channel, HTSSOP-20 package | Requires external feedback resistors; higher current capability but larger footprint and higher IQ (25µA) | Choose for designs needing flexible output voltages or >1A load headroom, accepting larger board area and higher standby power. |
| MP2491DS-LF-Z | Single 5V fixed-output, 2.2MHz, 1A, SOIC-8; no second channel or phase control | Only provides one regulated rail; lacks dual-channel coordination, PGOOD, or ILIM features | Choose only if system requires only 5V and space/cost constraints preclude dual-channel integration - requires separate 3.3V regulator. |
Compared with TPS65270PWP and MP2491DS-LF-Z, the LTC3622EDE-23/5#PBF delivers optimized value for fixed dual-rail, space-constrained, ultra-low-IQ applications - offering guaranteed 5V/3.3V accuracy, smallest package, and lowest quiescent current without sacrificing protection or control flexibility.
Availability
LTC3622EDE-23/5#PBF is available at Aetrix Electronics and suitable for handheld scanners, portable medical sensors, and industrial terminals requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature.
Supply support for LTC3622EDE-23/5#PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and communications markets since 1965.
The LTC3622 product line delivers ultralow-quiescent-current dual buck regulators for battery-critical portable electronics, emphasizing efficiency across light-to-full load, small solution size, and robust protection in harsh environments.
FAQ
What output voltages does the LTC3622EDE-23/5#PBF provide?
The LTC3622EDE-23/5#PBF provides two fixed, factory-programmed output voltages: Channel 1 delivers 5.0V ±1% and Channel 2 delivers 3.3V ±1%. These are achieved via internal feedback dividers - no external resistors are required, and FB1/FB2 pins must be shorted directly to their respective VOUT pins for proper regulation.
Does the LTC3622EDE-23/5#PBF support external clock synchronization?
Yes, the LTC3622EDE-23/5#PBF supports external clock synchronization via the MODE/SYNC pin. When driven by an external square wave, it locks to frequencies within ±50% of its nominal 2.25MHz switching frequency (i.e., 1.125MHz to 3.375MHz), and automatically enters pulse-skipping mode. This enables precise timing alignment with system clocks or noise-sensitive bands.
How is phase relationship controlled between the two channels of the LTC3622EDE-23/5#PBF?
The LTC3622EDE-23/5#PBF offers three phase-control methods: tying PHASE to GND yields 0° (in-phase) operation; tying PHASE to INTVCC yields 180° (anti-phase); and with PHASE = INTVCC and an external clock applied to MODE/SYNC, phase shift is dynamically set by the clock's duty cycle - rising edge aligns SW1, falling edge aligns SW2, enabling 90° or other intermediate shifts.
What is the quiescent current of the LTC3622EDE-23/5#PBF in shutdown mode?
In shutdown mode - achieved by pulling both RUN1 and RUN2 pins low - the LTC3622EDE-23/5#PBF draws less than 0.1µA from VIN. This ultra-low shutdown current preserves battery charge during extended storage or deep sleep states in portable equipment.
Can the LTC3622EDE-23/5#PBF operate with different input voltages on VIN1 and VIN2?
Yes, the LTC3622EDE-23/5#PBF supports independent input supplies: VIN1 powers Channel 1 and the INTVCC LDO, while VIN2 powers Channel 2. Both inputs accept 2.7V–17V and may differ in voltage (e.g., VIN1 = 12V for 5V rail, VIN2 = 5V for 3.3V rail), enabling flexible power architecture in multi-rail systems.
LTC3622EDE-23/5#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 3.3V, 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-DFN (4x3)
LTC3622EDE-23/5#PBF FAQ
1.How can I place an order for LTC3622EDE-23/5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3622EDE-23/5#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC3622EDE-23/5#PBF reliable?
The price and inventory of LTC3622EDE-23/5#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3622EDE-23/5#PBF is usually 5 days.
3.What payment methods are accepted for LTC3622EDE-23/5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3622EDE-23/5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3622EDE-23/5#PBF?
LTC3622EDE-23/5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3622EDE-23/5#PBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC3622EDE-23/5#PBF?
For technical support, including LTC3622EDE-23/5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3622EDE-23/5#PBF requirements.
6.How does Aetrix verify that LTC3622EDE-23/5#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3622EDE-23/5#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC3622EDE-23/5#PBF meets industry standards.
7.What is the process for return or replacement of LTC3622EDE-23/5#PBF?
All LTC3622EDE-23/5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3622EDE-23/5#PBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC3622EDE-23/5#PBF part is unused and in its original packaging.
Return procedure for LTC3622EDE-23/5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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